From 14bb08c1df8db9ec6c8a05520d4eee67971235d9 Mon Sep 17 00:00:00 2001 From: Dimitri Sokolyuk Date: Thu, 27 Sep 2018 20:03:23 +0200 Subject: mod tidy --- vendor/golang.org/x/image/bmp/reader.go | 199 ------------------------ vendor/golang.org/x/image/bmp/writer.go | 262 -------------------------------- 2 files changed, 461 deletions(-) delete mode 100644 vendor/golang.org/x/image/bmp/reader.go delete mode 100644 vendor/golang.org/x/image/bmp/writer.go (limited to 'vendor/golang.org/x/image/bmp') diff --git a/vendor/golang.org/x/image/bmp/reader.go b/vendor/golang.org/x/image/bmp/reader.go deleted file mode 100644 index a0f2715..0000000 --- a/vendor/golang.org/x/image/bmp/reader.go +++ /dev/null @@ -1,199 +0,0 @@ -// Copyright 2011 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// Package bmp implements a BMP image decoder and encoder. -// -// The BMP specification is at http://www.digicamsoft.com/bmp/bmp.html. -package bmp // import "golang.org/x/image/bmp" - -import ( - "errors" - "image" - "image/color" - "io" -) - -// ErrUnsupported means that the input BMP image uses a valid but unsupported -// feature. -var ErrUnsupported = errors.New("bmp: unsupported BMP image") - -func readUint16(b []byte) uint16 { - return uint16(b[0]) | uint16(b[1])<<8 -} - -func readUint32(b []byte) uint32 { - return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 -} - -// decodePaletted reads an 8 bit-per-pixel BMP image from r. -// If topDown is false, the image rows will be read bottom-up. -func decodePaletted(r io.Reader, c image.Config, topDown bool) (image.Image, error) { - paletted := image.NewPaletted(image.Rect(0, 0, c.Width, c.Height), c.ColorModel.(color.Palette)) - if c.Width == 0 || c.Height == 0 { - return paletted, nil - } - var tmp [4]byte - y0, y1, yDelta := c.Height-1, -1, -1 - if topDown { - y0, y1, yDelta = 0, c.Height, +1 - } - for y := y0; y != y1; y += yDelta { - p := paletted.Pix[y*paletted.Stride : y*paletted.Stride+c.Width] - if _, err := io.ReadFull(r, p); err != nil { - return nil, err - } - // Each row is 4-byte aligned. - if c.Width%4 != 0 { - _, err := io.ReadFull(r, tmp[:4-c.Width%4]) - if err != nil { - return nil, err - } - } - } - return paletted, nil -} - -// decodeRGB reads a 24 bit-per-pixel BMP image from r. -// If topDown is false, the image rows will be read bottom-up. -func decodeRGB(r io.Reader, c image.Config, topDown bool) (image.Image, error) { - rgba := image.NewRGBA(image.Rect(0, 0, c.Width, c.Height)) - if c.Width == 0 || c.Height == 0 { - return rgba, nil - } - // There are 3 bytes per pixel, and each row is 4-byte aligned. - b := make([]byte, (3*c.Width+3)&^3) - y0, y1, yDelta := c.Height-1, -1, -1 - if topDown { - y0, y1, yDelta = 0, c.Height, +1 - } - for y := y0; y != y1; y += yDelta { - if _, err := io.ReadFull(r, b); err != nil { - return nil, err - } - p := rgba.Pix[y*rgba.Stride : y*rgba.Stride+c.Width*4] - for i, j := 0, 0; i < len(p); i, j = i+4, j+3 { - // BMP images are stored in BGR order rather than RGB order. - p[i+0] = b[j+2] - p[i+1] = b[j+1] - p[i+2] = b[j+0] - p[i+3] = 0xFF - } - } - return rgba, nil -} - -// decodeNRGBA reads a 32 bit-per-pixel BMP image from r. -// If topDown is false, the image rows will be read bottom-up. -func decodeNRGBA(r io.Reader, c image.Config, topDown bool) (image.Image, error) { - rgba := image.NewNRGBA(image.Rect(0, 0, c.Width, c.Height)) - if c.Width == 0 || c.Height == 0 { - return rgba, nil - } - y0, y1, yDelta := c.Height-1, -1, -1 - if topDown { - y0, y1, yDelta = 0, c.Height, +1 - } - for y := y0; y != y1; y += yDelta { - p := rgba.Pix[y*rgba.Stride : y*rgba.Stride+c.Width*4] - if _, err := io.ReadFull(r, p); err != nil { - return nil, err - } - for i := 0; i < len(p); i += 4 { - // BMP images are stored in BGRA order rather than RGBA order. - p[i+0], p[i+2] = p[i+2], p[i+0] - } - } - return rgba, nil -} - -// Decode reads a BMP image from r and returns it as an image.Image. -// Limitation: The file must be 8, 24 or 32 bits per pixel. -func Decode(r io.Reader) (image.Image, error) { - c, bpp, topDown, err := decodeConfig(r) - if err != nil { - return nil, err - } - switch bpp { - case 8: - return decodePaletted(r, c, topDown) - case 24: - return decodeRGB(r, c, topDown) - case 32: - return decodeNRGBA(r, c, topDown) - } - panic("unreachable") -} - -// DecodeConfig returns the color model and dimensions of a BMP image without -// decoding the entire image. -// Limitation: The file must be 8, 24 or 32 bits per pixel. -func DecodeConfig(r io.Reader) (image.Config, error) { - config, _, _, err := decodeConfig(r) - return config, err -} - -func decodeConfig(r io.Reader) (config image.Config, bitsPerPixel int, topDown bool, err error) { - // We only support those BMP images that are a BITMAPFILEHEADER - // immediately followed by a BITMAPINFOHEADER. - const ( - fileHeaderLen = 14 - infoHeaderLen = 40 - ) - var b [1024]byte - if _, err := io.ReadFull(r, b[:fileHeaderLen+infoHeaderLen]); err != nil { - return image.Config{}, 0, false, err - } - if string(b[:2]) != "BM" { - return image.Config{}, 0, false, errors.New("bmp: invalid format") - } - offset := readUint32(b[10:14]) - if readUint32(b[14:18]) != infoHeaderLen { - return image.Config{}, 0, false, ErrUnsupported - } - width := int(int32(readUint32(b[18:22]))) - height := int(int32(readUint32(b[22:26]))) - if height < 0 { - height, topDown = -height, true - } - if width < 0 || height < 0 { - return image.Config{}, 0, false, ErrUnsupported - } - // We only support 1 plane, 8 or 24 bits per pixel and no compression. - planes, bpp, compression := readUint16(b[26:28]), readUint16(b[28:30]), readUint32(b[30:34]) - if planes != 1 || compression != 0 { - return image.Config{}, 0, false, ErrUnsupported - } - switch bpp { - case 8: - if offset != fileHeaderLen+infoHeaderLen+256*4 { - return image.Config{}, 0, false, ErrUnsupported - } - _, err = io.ReadFull(r, b[:256*4]) - if err != nil { - return image.Config{}, 0, false, err - } - pcm := make(color.Palette, 256) - for i := range pcm { - // BMP images are stored in BGR order rather than RGB order. - // Every 4th byte is padding. - pcm[i] = color.RGBA{b[4*i+2], b[4*i+1], b[4*i+0], 0xFF} - } - return image.Config{ColorModel: pcm, Width: width, Height: height}, 8, topDown, nil - case 24: - if offset != fileHeaderLen+infoHeaderLen { - return image.Config{}, 0, false, ErrUnsupported - } - return image.Config{ColorModel: color.RGBAModel, Width: width, Height: height}, 24, topDown, nil - case 32: - if offset != fileHeaderLen+infoHeaderLen { - return image.Config{}, 0, false, ErrUnsupported - } - return image.Config{ColorModel: color.RGBAModel, Width: width, Height: height}, 32, topDown, nil - } - return image.Config{}, 0, false, ErrUnsupported -} - -func init() { - image.RegisterFormat("bmp", "BM????\x00\x00\x00\x00", Decode, DecodeConfig) -} diff --git a/vendor/golang.org/x/image/bmp/writer.go b/vendor/golang.org/x/image/bmp/writer.go deleted file mode 100644 index f07b39d..0000000 --- a/vendor/golang.org/x/image/bmp/writer.go +++ /dev/null @@ -1,262 +0,0 @@ -// Copyright 2013 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package bmp - -import ( - "encoding/binary" - "errors" - "image" - "io" -) - -type header struct { - sigBM [2]byte - fileSize uint32 - resverved [2]uint16 - pixOffset uint32 - dibHeaderSize uint32 - width uint32 - height uint32 - colorPlane uint16 - bpp uint16 - compression uint32 - imageSize uint32 - xPixelsPerMeter uint32 - yPixelsPerMeter uint32 - colorUse uint32 - colorImportant uint32 -} - -func encodePaletted(w io.Writer, pix []uint8, dx, dy, stride, step int) error { - var padding []byte - if dx < step { - padding = make([]byte, step-dx) - } - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx - if _, err := w.Write(pix[min:max]); err != nil { - return err - } - if padding != nil { - if _, err := w.Write(padding); err != nil { - return err - } - } - } - return nil -} - -func encodeRGBA(w io.Writer, pix []uint8, dx, dy, stride, step int, opaque bool) error { - buf := make([]byte, step) - if opaque { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - off += 3 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } else { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - a := uint32(pix[i+3]) - if a == 0 { - buf[off+2] = 0 - buf[off+1] = 0 - buf[off+0] = 0 - buf[off+3] = 0 - off += 4 - continue - } else if a == 0xff { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - buf[off+3] = 0xff - off += 4 - continue - } - buf[off+2] = uint8(((uint32(pix[i+0]) * 0xffff) / a) >> 8) - buf[off+1] = uint8(((uint32(pix[i+1]) * 0xffff) / a) >> 8) - buf[off+0] = uint8(((uint32(pix[i+2]) * 0xffff) / a) >> 8) - buf[off+3] = uint8(a) - off += 4 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } - return nil -} - -func encodeNRGBA(w io.Writer, pix []uint8, dx, dy, stride, step int, opaque bool) error { - buf := make([]byte, step) - if opaque { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - off += 3 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } else { - for y := dy - 1; y >= 0; y-- { - min := y*stride + 0 - max := y*stride + dx*4 - off := 0 - for i := min; i < max; i += 4 { - buf[off+2] = pix[i+0] - buf[off+1] = pix[i+1] - buf[off+0] = pix[i+2] - buf[off+3] = pix[i+3] - off += 4 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - } - return nil -} - -func encode(w io.Writer, m image.Image, step int) error { - b := m.Bounds() - buf := make([]byte, step) - for y := b.Max.Y - 1; y >= b.Min.Y; y-- { - off := 0 - for x := b.Min.X; x < b.Max.X; x++ { - r, g, b, _ := m.At(x, y).RGBA() - buf[off+2] = byte(r >> 8) - buf[off+1] = byte(g >> 8) - buf[off+0] = byte(b >> 8) - off += 3 - } - if _, err := w.Write(buf); err != nil { - return err - } - } - return nil -} - -// Encode writes the image m to w in BMP format. -func Encode(w io.Writer, m image.Image) error { - d := m.Bounds().Size() - if d.X < 0 || d.Y < 0 { - return errors.New("bmp: negative bounds") - } - h := &header{ - sigBM: [2]byte{'B', 'M'}, - fileSize: 14 + 40, - pixOffset: 14 + 40, - dibHeaderSize: 40, - width: uint32(d.X), - height: uint32(d.Y), - colorPlane: 1, - } - - var step int - var palette []byte - var opaque bool - switch m := m.(type) { - case *image.Gray: - step = (d.X + 3) &^ 3 - palette = make([]byte, 1024) - for i := 0; i < 256; i++ { - palette[i*4+0] = uint8(i) - palette[i*4+1] = uint8(i) - palette[i*4+2] = uint8(i) - palette[i*4+3] = 0xFF - } - h.imageSize = uint32(d.Y * step) - h.fileSize += uint32(len(palette)) + h.imageSize - h.pixOffset += uint32(len(palette)) - h.bpp = 8 - - case *image.Paletted: - step = (d.X + 3) &^ 3 - palette = make([]byte, 1024) - for i := 0; i < len(m.Palette) && i < 256; i++ { - r, g, b, _ := m.Palette[i].RGBA() - palette[i*4+0] = uint8(b >> 8) - palette[i*4+1] = uint8(g >> 8) - palette[i*4+2] = uint8(r >> 8) - palette[i*4+3] = 0xFF - } - h.imageSize = uint32(d.Y * step) - h.fileSize += uint32(len(palette)) + h.imageSize - h.pixOffset += uint32(len(palette)) - h.bpp = 8 - case *image.RGBA: - opaque = m.Opaque() - if opaque { - step = (3*d.X + 3) &^ 3 - h.bpp = 24 - } else { - step = 4 * d.X - h.bpp = 32 - } - h.imageSize = uint32(d.Y * step) - h.fileSize += h.imageSize - case *image.NRGBA: - opaque = m.Opaque() - if opaque { - step = (3*d.X + 3) &^ 3 - h.bpp = 24 - } else { - step = 4 * d.X - h.bpp = 32 - } - h.imageSize = uint32(d.Y * step) - h.fileSize += h.imageSize - default: - step = (3*d.X + 3) &^ 3 - h.imageSize = uint32(d.Y * step) - h.fileSize += h.imageSize - h.bpp = 24 - } - - if err := binary.Write(w, binary.LittleEndian, h); err != nil { - return err - } - if palette != nil { - if err := binary.Write(w, binary.LittleEndian, palette); err != nil { - return err - } - } - - if d.X == 0 || d.Y == 0 { - return nil - } - - switch m := m.(type) { - case *image.Gray: - return encodePaletted(w, m.Pix, d.X, d.Y, m.Stride, step) - case *image.Paletted: - return encodePaletted(w, m.Pix, d.X, d.Y, m.Stride, step) - case *image.RGBA: - return encodeRGBA(w, m.Pix, d.X, d.Y, m.Stride, step, opaque) - case *image.NRGBA: - return encodeNRGBA(w, m.Pix, d.X, d.Y, m.Stride, step, opaque) - } - return encode(w, m, step) -} -- cgit v1.2.3